改性二氧化硅纳米粒子反相乳液深井钻井液研究  

Study on modified silica nanoparticle inverse emulsion deep well drilling fluid

作　　者：凌勇 LING Yong(CNPC(Xinjiang)Petroleum Engineering Co.,Ltd.,Karamay 834000,Xinjiang,China)

机构地区：[1]中油(新疆)石油工程有限公司,新疆克拉玛依834000

出　　处：《能源化工》2023年第4期47-52,共6页Energy Chemical Industry

基　　金：国家科技重大专项“页岩气水平井水基钻井液研究”(2016ZX05022001)。

摘　　要：深井钻井的油基钻井液应具有稳定性和耐高温性能,而油包水的反相乳液作为油基钻井液是较好的选择。在深井钻井中,高温会使聚合物表面活性剂降解并发生相分离。使用十八烷基三甲氧基硅烷改性的二氧化硅纳米粒子,在钻井液模型中形成稳定的油包水反相乳液,使乳状流体形成60μm水滴。此外,流变学试验结果表明,使用疏水性二氧化硅纳米粒子可以得到稳定的油包水反相乳液,其性能可以通过调节纳米粒子的性质和含量进行改性。120℃下老化试验结果表明,其在高温下也具有良好的稳定性,适用于深井钻井作业。Oil-based drilling fluids for deep well drilling should have stability and high temperature resistance,and water-in-oil inverse emulsions are a good choice as oil-based drilling fluids.In deep well drilling,high temperature will cause polymer surfactants to degrade and phase separation occurs.The octadecyltrimethoxysilane modified silica nanoparticles are used to form a stable water-in-oil inverse emulsion in a drilling fluid model,so that the emulsion fluid forms 60μm water droplets.In addition,rheology shows that the use of hydrophobic silica nanoparticles can obtain stable water-in-oil inverse emulsions,the properties of which can be modified by adjusting the properties and content of the nanoparticles.The aging test at 120℃shows that it has good stability at high temperatures and is suitable for deep well drilling operations.

关 键 词：深钻 钻井液模型 高温老化 流变学 二氧化硅纳米粒子 

分 类 号：TE254[石油与天然气工程—油气井工程]